It does run fairly slow with some of the debug overlays on, but with the overlays off I get a solid 60fps - it's averaging about 4-5ms per frame draw without en

It does run fairly slow with some of the debug overlays on, but with the overlays off I get a solid 60fps - it's averaging about 4-5ms per frame draw without enabling the overlays. What kind of machine are you running it on? There's a ton of room for improvement still, this is just an initial release.